Mixed Quiz (See related pages) 1 In a MOSFET, the gate is an n-type substrate. A) True B) False 2 The operation of a depletion-mode MOSFET is similar to that of a JFET when VGS is positive. A) True B) False 3 The depletion-mode MOSFET or D-MOSFET is normally on the device. A) True B) False 4 Depletion-mode MOSFETs can operate with a positive or negative gate voltage. A) True B) False 5 One of the major advantages of the D-MOSFET is its extremely low input resistance. A) True B) False 6 The enhancement-mode MOSFET is normally on when the gate voltage is zero. A) True B) False 7 With zero gate voltage, a JFET is off, whereas an E-MOSFET is on. A) True B) False 8 Some MOSFETs are protected against static charges by a built-in zener diode in parallel with the gate and the source. A) True B) False 9 The E-MOSFET is primarily an amplifying device. A) True B) False 10 A signal that is discontinuous and jumps between two distinct voltage levels is called . 11 A simple computer circuit that causes its output voltage to be opposite of the input voltage is the . 12 A device that consists of thousands of microscopically small transistors is a(n) . 13 A power FET that operates as a device B and allows device A to communicate with or control device C is called a(n) . 14 A circuit that converts an input direct current voltage to an output dc voltage that is either higher or lower is called a(n) converter. 15 Personal computers have proliferated because of the . 16 When the gate voltage is zero, the E-MOSFET is . 17 A signal that is continuous like a sine wave is referred to as . 18 One method used to reduce the current drain of a digital circuit is with A) passive resistors B) constant current sources C) complementary MOS D) JFETs 19 A discrete E-MOSFET widely used in applications that control motors, lamps, disk drives, and power supplies is called a A) complementary MOS B) power FET C) digital FET D) analog FET 20 When two bipolar junction transistors are connected in parallel, the transistor with the lower VBE takes more collector current than the others in a condition known as A) current matching B) current draining C) current hogging D) current flowing 21 A system that converts a battery’s dc voltage to an ac voltage to drive a computer is called A) an uninterruptible power supply B) an inverter C) a multiplexer D) a battery charger 22 Why are MOSFETs sometimes shipped with leads inserted into a conductive foam? A) to serve as a heat sink B) to absorb drain current C) to prevent damage from static charges D) to prevent damage from excess currents 23 Because a bipolar junction transistor has a negative temperature coefficient, it may be damaged by A) static charges B) thermal runaway C) improper grounding D) improper coupling 24 When a MOSFET is configured with its gate connected to its drain A) it operates as an active resistance B) it will amplify only high frequencies C) it will stay at cutoff D) it will stay at saturation 25 One major advantage of a power FET over a bipolar junction transistor is A) that an FET is current controlled B) the lack of thermal runaway C) the lower input resistance D) it requires a larger heat sink
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